// -----------------------------------------------
// Design : Muhamad Aris
// URL    : https://www.facebook.com/aris.zoldyck
// -----------------------------------------------
//<![CDATA[
var scrollTimer = null;
$(window).scroll(function() {
   var viewportHeight = $(this).height(),
       scrollbarHeight = viewportHeight / $(document).height() * viewportHeight,
       progress = $(this).scrollTop() / ($(document).height() - viewportHeight),
       distance = progress * (viewportHeight - scrollbarHeight) + scrollbarHeight / 2 - $('#scroll').height() / 2;
    $('#scroll')
        .css('top', distance)
        .text(Math.round(progress * 100) + '%')
        .fadeIn(100);
    if (scrollTimer !== null) {
        clearTimeout(scrollTimer);
    }
    scrollTimer = setTimeout(function() {
        $('#scroll').fadeOut();
    }, 1000);
});
//]]>